media: videobuf2: Explicitly state max size of planes

The plane size needs to be PAGE_ALIGNED, so it is not possible to have
sizes bigger than MAX_INT - PAGE_SIZE.

We already check for overflows when that happen:
 if (size < vb->planes[plane].length)
goto free;

But it is good to explicitly state our max allowed value, in order to
align with the driver expectations.

Signed-off-by: Ricardo Ribalda <ribalda@chromium.org>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

media: Add maintainer for IMX jpeg v4l2 driver

The driver is located in drivers/media/platform/imx-jpeg,
and it applies to the JPEG decoder from i.MX QXP and QM.

Signed-off-by: Mirela Rabulea <mirela.rabulea@nxp.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

media: imx-jpeg: Add V4L2 driver for i.MX8 JPEG Encoder/Decoder

V4L2 driver for the JPEG encoder/decoder from i.MX8QXP/i.MX8QM application
processors.
The multi-planar buffers API is used.

Baseline and extended sequential jpeg decoding is supported.
Progressive jpeg decoding is not supported by the IP.
Supports encode and decode of various formats:
     YUV444, YUV422, YUV420, RGB, ARGB, Gray
YUV420 is the only multi-planar format supported.
Minimum resolution is 64 x 64, maximum 8192 x 8192.
The alignment requirements for the resolution depend on the format,
multiple of 16 resolutions should work for all formats.

v4l2-compliance tests are passing, including the
streaming tests, "v4l2-compliance -s"

[hverkuil: fix kernel-doc typos]

Signed-off-by: Mirela Rabulea <mirela.rabulea@nxp.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

media: Avoid parsing quantization and huffman tables

These are optional in struct v4l2_jpeg_header, so skip DHT/DQT segment
parsing if huffman_tables/quantization_tables were not requested by user,
to save time.
However, do count them (num_dht/num_dqt).

Signed-off-by: Mirela Rabulea <mirela.rabulea@nxp.com>
Reviewed-by: Philipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

media: Quit parsing stream if doesn't start with SOI

In the case we get an invalid stream, such as from v4l2-compliance
streaming test, jpeg_next_marker will end up parsing the entire
stream. The standard describes the high level syntax of a jpeg
as starting with SOI, ending with EOI, so return error if the very
first 2 bytes are not SOI.

Signed-off-by: Mirela Rabulea <mirela.rabulea@nxp.com>
Reviewed-by: Philipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

media: Add parsing for APP14 data segment in jpeg helpers

According to Rec. ITU-T T.872 (06/2012) 6.5.3
APP14 segment is for color encoding, it contains a transform flag, which
may have values of 0, 1 and 2 and are interpreted as follows:
0 - CMYK for images that are encoded with four components
  - RGB for images that are encoded with three components
1 - An image encoded with three components using YCbCr colour encoding.
2 - An image encoded with four components using YCCK colour encoding.

This is used in imx-jpeg decoder, to distinguish between
YUV444 and RGB24.

Signed-off-by: Mirela Rabulea <mirela.rabulea@nxp.com>
Reviewed-by: Philipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

media: dt-bindings: Add bindings for i.MX8QXP/QM JPEG driver

Add bindings documentation for i.MX8QXP/QM JPEG decoder & encoder driver.

Signed-off-by: Mirela Rabulea <mirela.rabulea@nxp.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

media: v4l: Add packed YUV444 24bpp pixel format

The added format is V4L2_PIX_FMT_YUV24, this is a packed
YUV 4:4:4 format, with 8 bits for each component, 24 bits
per sample.

This format is used by the i.MX 8QuadMax and i.MX 8DualXPlus/8QuadXPlus
JPEG encoder/decoder.

Signed-off-by: Mirela Rabulea <mirela.rabulea@nxp.com>
Reviewed-by: Paul Kocialkowski <paul.kocialkowski@bootlin.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

media: cec/core/cec-notifier: use IS_REACHABLE(CONFIG_I2C)

If CONFIG_I2C=m and CONFIG_CEC_CORE=y then of_find_i2c_device_by_node()
is not reachable. So use IS_REACHABLE instead of IS_ENABLED.

Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Fixes: a62943c145c1 ("media: cec-notifier: also search for HDMI devices on I2C")
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

media: media tuner headers: fix kernel-doc warnings

Fix the following kernel-doc warnings:

drivers/media/tuners/it913x.h:28: warning: Function parameter or member 'fe' not described in 'it913x_platform_data'
drivers/media/tuners/tda827x.h:34: warning: wrong kernel-doc identifier on line:
 * Attach a tda827x tuner to the supplied frontend structure.
drivers/media/tuners/qt1010.h:20: warning: wrong kernel-doc identifier on line:
 * Attach a qt1010 tuner to the supplied frontend structure.

Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

media: vpbe_osd.h/uvcvideo.h includes: fix trivial kernel-doc warnings

Fix these kernel-doc warnings:

include/media/davinci/vpbe_osd.h:77: warning: Enum value 'PIXFMT_YCBCRI' not described in enum 'osd_pix_format'
include/media/davinci/vpbe_osd.h:77: warning: Enum value 'PIXFMT_YCRCBI' not described in enum 'osd_pix_format'
include/media/davinci/vpbe_osd.h:77: warning: Excess enum value 'PIXFMT_YCrCbI' description in 'osd_pix_format'
include/media/davinci/vpbe_osd.h:77: warning: Excess enum value 'PIXFMT_YCbCrI' description in 'osd_pix_format'
include/media/davinci/vpbe_osd.h:232: warning: expecting prototype for enum davinci_cursor_v_width. Prototype was for enum
osd_cursor_v_width instead
include/uapi/linux/uvcvideo.h:98: warning: Function parameter or member 'ns' not described in 'uvc_meta_buf'
include/uapi/linux/uvcvideo.h:98: warning: Function parameter or member 'sof' not described in 'uvc_meta_buf'
include/uapi/linux/uvcvideo.h:98: warning: Function parameter or member 'length' not described in 'uvc_meta_buf'
include/uapi/linux/uvcvideo.h:98: warning: Function parameter or member 'flags' not described in 'uvc_meta_buf'
include/uapi/linux/uvcvideo.h:98: warning: Function parameter or member 'buf' not described in 'uvc_meta_buf'

Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

media: media/i2c: fix kerneldoc issues for media i2c headers

This fixes these kernel-doc warnings:

include/media/i2c/tvp514x.h:70: warning: Enum value 'INPUT_CVBS_VI1A' not described in enum 'tvp514x_input'
include/media/i2c/tvp514x.h:70: warning: Enum value 'INPUT_CVBS_VI1B' not described in enum 'tvp514x_input'
include/media/i2c/tvp514x.h:70: warning: Enum value 'INPUT_CVBS_VI1C' not described in enum 'tvp514x_input'
include/media/i2c/tvp514x.h:70: warning: Enum value 'INPUT_CVBS_VI2A' not described in enum 'tvp514x_input'
include/media/i2c/tvp514x.h:70: warning: Enum value 'INPUT_CVBS_VI2B' not described in enum 'tvp514x_input'
include/media/i2c/tvp514x.h:70: warning: Enum value 'INPUT_CVBS_VI2C' not described in enum 'tvp514x_input'
include/media/i2c/tvp514x.h:70: warning: Enum value 'INPUT_CVBS_VI3A' not described in enum 'tvp514x_input'
include/media/i2c/tvp514x.h:70: warning: Enum value 'INPUT_CVBS_VI3B' not described in enum 'tvp514x_input'
include/media/i2c/tvp514x.h:70: warning: Enum value 'INPUT_CVBS_VI3C' not described in enum 'tvp514x_input'
include/media/i2c/tvp514x.h:70: warning: Enum value 'INPUT_CVBS_VI4A' not described in enum 'tvp514x_input'
include/media/i2c/tvp514x.h:70: warning: Enum value 'INPUT_SVIDEO_VI2A_VI1A' not described in enum 'tvp514x_input'

include/media/i2c/tvp514x.h:70: warning: Enum value 'INPUT_SVIDEO_VI2B_VI1B' not described in enum 'tvp514x_input'

include/media/i2c/tvp514x.h:70: warning: Enum value 'INPUT_SVIDEO_VI2C_VI1C' not described in enum 'tvp514x_input'

include/media/i2c/tvp514x.h:70: warning: Enum value 'INPUT_SVIDEO_VI2A_VI3A' not described in enum 'tvp514x_input'

include/media/i2c/tvp514x.h:70: warning: Enum value 'INPUT_SVIDEO_VI2B_VI3B' not described in enum 'tvp514x_input'

include/media/i2c/tvp514x.h:70: warning: Enum value 'INPUT_SVIDEO_VI2C_VI3C' not described in enum 'tvp514x_input'

include/media/i2c/tvp514x.h:70: warning: Enum value 'INPUT_SVIDEO_VI4A_VI1A' not described in enum 'tvp514x_input'

include/media/i2c/tvp514x.h:70: warning: Enum value 'INPUT_SVIDEO_VI4A_VI1B' not described in enum 'tvp514x_input'

include/media/i2c/tvp514x.h:70: warning: Enum value 'INPUT_SVIDEO_VI4A_VI1C' not described in enum 'tvp514x_input'

include/media/i2c/tvp514x.h:70: warning: Enum value 'INPUT_SVIDEO_VI4A_VI3A' not described in enum 'tvp514x_input'

include/media/i2c/tvp514x.h:70: warning: Enum value 'INPUT_SVIDEO_VI4A_VI3B' not described in enum 'tvp514x_input'

include/media/i2c/tvp514x.h:70: warning: Enum value 'INPUT_SVIDEO_VI4A_VI3C' not described in enum 'tvp514x_input'

include/media/i2c/tvp514x.h:70: warning: Enum value 'INPUT_INVALID' not described in enum 'tvp514x_input'
include/media/i2c/tvp514x.h:82: warning: Enum value 'OUTPUT_10BIT_422_EMBEDDED_SYNC' not described in enum 'tvp514x_output'
include/media/i2c/tvp514x.h:82: warning: Enum value 'OUTPUT_20BIT_422_SEPERATE_SYNC' not described in enum 'tvp514x_output'
include/media/i2c/tvp514x.h:82: warning: Enum value 'OUTPUT_10BIT_422_SEPERATE_SYNC' not described in enum 'tvp514x_output'
include/media/i2c/tvp514x.h:82: warning: Enum value 'OUTPUT_INVALID' not described in enum 'tvp514x_output'
include/media/i2c/adv7343.h:38: warning: cannot understand function prototype: 'struct adv7343_power_mode '
include/media/i2c/s5k4ecgx.h:31: warning: expecting prototype for struct ss5k4ecgx_platform_data. Prototype was for struct
s5k4ecgx_platform_data instead
include/media/i2c/mt9t112.h:21: warning: cannot understand function prototype: 'struct mt9t112_platform_data '
include/media/i2c/noon010pc30.h:13: warning: Cannot understand  * @clk_rate: the clock frequency in Hz
include/media/i2c/s5k6aa.h:45: warning: Function parameter or member 'bus_type' not described in 's5k6aa_platform_data'
include/media/i2c/tw9910.h:19: warning: cannot understand function prototype: 'enum tw9910_mpout_pin '
include/media/i2c/tw9910.h:36: warning: cannot understand function prototype: 'struct tw9910_video_info '
include/media/i2c/ov772x.h:53: warning: cannot understand function prototype: 'struct ov772x_camera_info '
include/media/i2c/s5c73m3.h:53: warning: Function parameter or member 'bus_type' not described in 's5c73m3_platform_data'
drivers/media/i2c/ccs/ccs-quirk.h:50: warning: Function parameter or member 'post_streamoff' not described in 'ccs_quirk'
drivers/media/i2c/ccs/ccs-quirk.h:50: warning: Function parameter or member 'flags' not described in 'ccs_quirk'
drivers/media/i2c/ccs/ccs-data.h:144: warning: expecting prototype for struct ccs_pdaf_pix_loc_block_desc. Prototype was for struct
ccs_pdaf_pix_loc_pixel_desc instead
drivers/media/i2c/tvp514x_regs.h:272: warning: Function parameter or member 'token' not described in 'tvp514x_reg'
drivers/media/i2c/tvp514x_regs.h:272: warning: Function parameter or member 'reg' not described in 'tvp514x_reg'
drivers/media/i2c/tvp514x_regs.h:272: warning: Function parameter or member 'val' not described in 'tvp514x_reg'
drivers/media/i2c/m5mols/m5mols.h:69: warning: Function parameter or member 'brightness' not described in 'm5mols_exif'
drivers/media/i2c/m5mols/m5mols.h:147: error: Cannot parse struct or union!
drivers/media/i2c/adv748x/adv748x.h:65: warning: Enum value 'ADV748X_PORT_AIN0' not described in enum 'adv748x_ports'
drivers/media/i2c/adv748x/adv748x.h:65: warning: Enum value 'ADV748X_PORT_AIN1' not described in enum 'adv748x_ports'
drivers/media/i2c/adv748x/adv748x.h:65: warning: Enum value 'ADV748X_PORT_AIN2' not described in enum 'adv748x_ports'
drivers/media/i2c/adv748x/adv748x.h:65: warning: Enum value 'ADV748X_PORT_AIN3' not described in enum 'adv748x_ports'
drivers/media/i2c/adv748x/adv748x.h:65: warning: Enum value 'ADV748X_PORT_AIN4' not described in enum 'adv748x_ports'
drivers/media/i2c/adv748x/adv748x.h:65: warning: Enum value 'ADV748X_PORT_AIN5' not described in enum 'adv748x_ports'
drivers/media/i2c/adv748x/adv748x.h:65: warning: Enum value 'ADV748X_PORT_AIN6' not described in enum 'adv748x_ports'
drivers/media/i2c/adv748x/adv748x.h:65: warning: Enum value 'ADV748X_PORT_AIN7' not described in enum 'adv748x_ports'
drivers/media/i2c/adv748x/adv748x.h:65: warning: Enum value 'ADV748X_PORT_HDMI' not described in enum 'adv748x_ports'
drivers/media/i2c/adv748x/adv748x.h:65: warning: Enum value 'ADV748X_PORT_TTL' not described in enum 'adv748x_ports'
drivers/media/i2c/adv748x/adv748x.h:65: warning: Enum value 'ADV748X_PORT_TXA' not described in enum 'adv748x_ports'
drivers/media/i2c/adv748x/adv748x.h:65: warning: Enum value 'ADV748X_PORT_TXB' not described in enum 'adv748x_ports'
drivers/media/i2c/adv748x/adv748x.h:65: warning: Enum value 'ADV748X_PORT_MAX' not described in enum 'adv748x_ports'
drivers/media/i2c/adv748x/adv748x.h:199: warning: Function parameter or member 'i2c_clients' not described in 'adv748x_state'
drivers/media/i2c/adv748x/adv748x.h:199: warning: Function parameter or member 'regmap' not described in 'adv748x_state'

Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

media: media/pci: fix kerneldoc issues in two headers

This fixes these kerneldoc warnings:

drivers/media/pci/tw686x/tw686x.h:143: warning: Function parameter or member 'v4l2_dev' not described in 'tw686x_dev'
drivers/media/pci/tw686x/tw686x.h:143: warning: Function parameter or member 'snd_card' not described in 'tw686x_dev'
drivers/media/pci/tw686x/tw686x.h:143: warning: Function parameter or member 'name' not described in 'tw686x_dev'
drivers/media/pci/tw686x/tw686x.h:143: warning: Function parameter or member 'type' not described in 'tw686x_dev'
drivers/media/pci/tw686x/tw686x.h:143: warning: Function parameter or member 'dma_mode' not described in 'tw686x_dev'
drivers/media/pci/tw686x/tw686x.h:143: warning: Function parameter or member 'pci_dev' not described in 'tw686x_dev'
drivers/media/pci/tw686x/tw686x.h:143: warning: Function parameter or member 'mmio' not described in 'tw686x_dev'
drivers/media/pci/tw686x/tw686x.h:143: warning: Function parameter or member 'dma_ops' not described in 'tw686x_dev'
drivers/media/pci/tw686x/tw686x.h:143: warning: Function parameter or member 'video_channels' not described in 'tw686x_dev'
drivers/media/pci/tw686x/tw686x.h:143: warning: Function parameter or member 'audio_channels' not described in 'tw686x_dev'
drivers/media/pci/tw686x/tw686x.h:143: warning: Function parameter or member 'audio_rate' not described in 'tw686x_dev'
drivers/media/pci/tw686x/tw686x.h:143: warning: Function parameter or member 'period_size' not described in 'tw686x_dev'
drivers/media/pci/tw686x/tw686x.h:143: warning: Function parameter or member 'audio_enabled' not described in 'tw686x_dev'
drivers/media/pci/tw686x/tw686x.h:143: warning: Function parameter or member 'dma_delay_timer' not described in 'tw686x_dev'
drivers/media/pci/tw686x/tw686x.h:143: warning: Function parameter or member 'pending_dma_en' not described in 'tw686x_dev'
drivers/media/pci/tw686x/tw686x.h:143: warning: Function parameter or member 'pending_dma_cmd' not described in 'tw686x_dev'
drivers/media/pci/sta2x11/sta2x11_vip.h:25: warning: Function parameter or member 'i2c_id' not described in 'vip_config'
drivers/media/pci/sta2x11/sta2x11_vip.h:25: warning: Function parameter or member 'i2c_addr' not described in 'vip_config'

Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

media: core headers: fix kernel-doc warnings

This patch fixes the following kernel-doc warnings:

include/uapi/linux/videodev2.h:996: warning: Function parameter or member 'm' not described in 'v4l2_plane'
include/uapi/linux/videodev2.h:996: warning: Function parameter or member 'reserved' not described in 'v4l2_plane'
include/uapi/linux/videodev2.h:1057: warning: Function parameter or member 'm' not described in 'v4l2_buffer'
include/uapi/linux/videodev2.h:1057: warning: Function parameter or member 'reserved2' not described in 'v4l2_buffer'
include/uapi/linux/videodev2.h:1057: warning: Function parameter or member 'reserved' not described in 'v4l2_buffer'
include/uapi/linux/videodev2.h:1068: warning: Function parameter or member 'tv' not described in 'v4l2_timeval_to_ns'
include/uapi/linux/videodev2.h:1068: warning: Excess function parameter 'ts' description in 'v4l2_timeval_to_ns'
include/uapi/linux/videodev2.h:1138: warning: Function parameter or member 'reserved' not described in 'v4l2_exportbuffer'
include/uapi/linux/videodev2.h:2237: warning: Function parameter or member 'reserved' not described in 'v4l2_plane_pix_format'
include/uapi/linux/videodev2.h:2270: warning: Function parameter or member 'hsv_enc' not described in 'v4l2_pix_format_mplane'
include/uapi/linux/videodev2.h:2270: warning: Function parameter or member 'reserved' not described in 'v4l2_pix_format_mplane'
include/uapi/linux/videodev2.h:2281: warning: Function parameter or member 'reserved' not described in 'v4l2_sdr_format'
include/uapi/linux/videodev2.h:2315: warning: Function parameter or member 'fmt' not described in 'v4l2_format'

include/uapi/linux/v4l2-subdev.h:53: warning: Function parameter or member 'reserved' not described in 'v4l2_subdev_format'
include/uapi/linux/v4l2-subdev.h:66: warning: Function parameter or member 'reserved' not described in 'v4l2_subdev_crop'
include/uapi/linux/v4l2-subdev.h:89: warning: Function parameter or member 'reserved' not described in 'v4l2_subdev_mbus_code_enum'
include/uapi/linux/v4l2-subdev.h:108: warning: Function parameter or member 'min_width' not described in 'v4l2_subdev_frame_size_enum'
include/uapi/linux/v4l2-subdev.h:108: warning: Function parameter or member 'max_width' not described in 'v4l2_subdev_frame_size_enum'
include/uapi/linux/v4l2-subdev.h:108: warning: Function parameter or member 'min_height' not described in 'v4l2_subdev_frame_size_enum'
include/uapi/linux/v4l2-subdev.h:108: warning: Function parameter or member 'max_height' not described in 'v4l2_subdev_frame_size_enum'
include/uapi/linux/v4l2-subdev.h:108: warning: Function parameter or member 'reserved' not described in 'v4l2_subdev_frame_size_enum'
include/uapi/linux/v4l2-subdev.h:119: warning: Function parameter or member 'reserved' not described in 'v4l2_subdev_frame_interval'
include/uapi/linux/v4l2-subdev.h:140: warning: Function parameter or member 'reserved' not described in 'v4l2_subdev_frame_interval_enum'

include/uapi/linux/cec.h:406: warning: Function parameter or member 'raw' not described in 'cec_connector_info'
include/uapi/linux/cec.h:470: warning: Function parameter or member 'flags' not described in 'cec_event'

include/media/v4l2-h264.h:82: warning: Function parameter or member 'reflist' not described in 'v4l2_h264_build_p_ref_list'
include/media/v4l2-h264.h:82: warning: expecting prototype for v4l2_h264_build_b_ref_lists(). Prototype was for v4l2_h264_build_p_ref_list()
instead

include/media/cec.h:50: warning: Function parameter or member 'lock' not described in 'cec_devnode'

include/media/v4l2-jpeg.h:122: warning: Function parameter or member 'num_dht' not described in 'v4l2_jpeg_header'
include/media/v4l2-jpeg.h:122: warning: Function parameter or member 'num_dqt' not described in 'v4l2_jpeg_header'

Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

media: ext-ctrls-codec.rst: clarify V4L2_CID_MPEG_VIDEO_BITRATE

The documentation for V4L2_CID_MPEG_VIDEO_BITRATE was missing the word
'Average': this is the average video bitrate.

The V4L2_CID_MPEG_VIDEO_BITRATE_PEAK documentation *does* refer to
V4L2_CID_MPEG_VIDEO_BITRATE as the average video bitrate.

Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

media: m88ds3103: fix return value check in m88ds3103_probe()

In case of error, the function i2c_new_dummy_device() returns
ERR_PTR() and never returns NULL. The NULL test in the return
value check should be replaced with IS_ERR().

Fixes: e6089feca460 ("media: m88ds3103: Add support for ds3103b demod")
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

media: tuners: fix error return code of hybrid_tuner_request_state()

When kzalloc() fails and state is NULL, no error return code is
assigned.
To fix this bug, __ret is assigned with -ENOMEM in this case.

Reported-by: TOTE Robot <oslab@tsinghua.edu.cn>
Signed-off-by: Jia-Ju Bai <baijiaju1990@gmail.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

media: platform: sunxi: sun6i-csi: fix error return code of sun6i_video_start_streaming()

When sun6i_video_remote_subdev() returns NULL to subdev, no error return
code of sun6i_video_start_streaming() is assigned.
To fix this bug, ret is assigned with -EINVAL in this case.

Reported-by: TOTE Robot <oslab@tsinghua.edu.cn>
Signed-off-by: Jia-Ju Bai <baijiaju1990@gmail.com>
Fixes: 5cc7522d8965 ("media: sun6i: Add support for Allwinner CSI V3s")
Acked-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

media: flexcop-usb: delete unneeded return

No need for a return after a break;

Signed-off-by: Julia Lawall <Julia.Lawall@inria.fr>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

media: vidtv: remove duplicate include in vidtv_psi

'string.h' included in 'vidtv_psi.c' is duplicated.

Signed-off-by: Zhang Yunkai <zhang.yunkai@zte.com.cn>
Acked-by: Daniel Almeida <dwlsalmeida@gmail.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

media: platform: xilinx: fix error return code of xvip_graph_init()

When the list of xdev->notifier.asd_list is empty, no error return code
of xvip_graph_init() is assigned.
To fix this bug, ret is assigned with -ENOENT as error return code.

Reported-by: TOTE Robot <oslab@tsinghua.edu.cn>
Signed-off-by: Jia-Ju Bai <baijiaju1990@gmail.com>
Reviewed-by: Michal Simek <michal.simek@xilinx.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

media: ti-vpe: cal: Implement media controller centric API

The CAL driver is video node centric, it controls the whole device
through the video device nodes. This limits the possible use cases as it
can't support sources that are more complex than a single subdev. To
support more complex hardware pipelines, implement support for the media
controller centric API. The exposed API can be selected through a module
parameter.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

media: ti-vpe: cal: fix subdev mbus_code enumeration

The cal_ctx_v4l2_init_formats() function does not handle error values
correctly when calling enum_mbus_code in subdevs, causing an infinite
loop if the subdev's enum_mbus_code returns some other error than EINVAL.

Fix the error handling.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

media: ti-vpe: cal: remove unneeded assignment

v4l2_fill_pix_format() already copies mbus_fmt.field, so no need to do
it again.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

media: exynos4-is: add missing call to of_node_put()

In one of the error paths of the for_each_child_of_node() loop in
fimc_md_parse_one_endpoint, add missing call to of_node_put().

Fix the following coccicheck warning:
./drivers/media/platform/exynos4-is/media-dev.c:489:1-23: WARNING:
Function "for_each_child_of_node" should have of_node_put() before
return around line 492.

Reported-by: Abaci Robot <abaci@linux.alibaba.com>
Signed-off-by: Yang Li <yang.lee@linux.alibaba.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

media: vim2m: initialize the media device earlier

Before the video device node is registered, the v4l2_dev.mdev
pointer must be set in order to correctly associate the video
device with the media device. Move the initialization of the
media device up.

Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

media: uapi: vp8: Fix kernel-doc warnings

Fix following warnings:

./scripts/kernel-doc --none include/uapi/linux/v4l2-controls.h

        include/uapi/linux/v4l2-controls.h:1727: warning: bad line:
        include/uapi/linux/v4l2-controls.h:1853: warning: expecting prototype for struct v4l2_vp8_frame. Prototype was for struct v4l2_ctrl_vp8_frame instead
        include/uapi/linux/v4l2-controls.h:1853: warning: Function parameter or member 'segment' not described in 'v4l2_ctrl_vp8_frame'
        include/uapi/linux/v4l2-controls.h:1853: warning: Function parameter or member 'entropy' not described in 'v4l2_ctrl_vp8_frame'
        include/uapi/linux/v4l2-controls.h:1853: warning: Function parameter or member 'coder_state' not described in 'v4l2_ctrl_vp8_frame'

Reported-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Signed-off-by: Ezequiel Garcia <ezequiel@collabora.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

media: uapi: move VP8 stateless controls out of staging

Until now, the VP8 V4L2 API was not exported as a public API,
and only defined in a private media header (media/vp8-ctrls.h).

The reason for this was a concern about the API not complete
and ready to support VP8 decoding hardware accelerators.

After reviewing the VP8 specification in detail, and now
that the API is able to support Cedrus and Hantro G1,
we can consider this ready.

Signed-off-by: Ezequiel Garcia <ezequiel@collabora.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

media: vp8: Rename V4L2 VP8 specific macro to V4L2_VP8_

Before we move the VP8 controls to a stable public header,
rename this macro so it's clearly V4L2-specific.

Signed-off-by: Ezequiel Garcia <ezequiel@collabora.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

media: controls: Log VP8 stateless control in .std_log

Simply print the type of the control.

Signed-off-by: Ezequiel Garcia <ezequiel@collabora.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

media: uapi: Move the VP8 stateless control type out of staging

Move the VP8 stateless control types out of staging,
and re-number it to avoid any confusion.

Signed-off-by: Ezequiel Garcia <ezequiel@collabora.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

media: uapi: Move parsed VP8 pixel format out of staging

Since we are ready to stabilize the VP8 stateless API,
move the parsed VP8 pixel format.

Signed-off-by: Ezequiel Garcia <ezequiel@collabora.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

media: uapi: vp8: Add proper kernel-doc documentation

In preparation for making the interface public,
document all the structures.

Signed-off-by: Ezequiel Garcia <ezequiel@collabora.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

media: uapi: vp8: Rename v4l2_vp8_loopfilter to v4l2_vp8_loop_filter

Rename to struct v4l2_vp8_loop_filter, which is closer to the
VP8 syntax. This change is only cosmetics, but since this API
is exposed to userspace, it's worth the trouble to get it consistent.

Signed-off-by: Ezequiel Garcia <ezequiel@collabora.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

media: uapi: vp8: Remove "header" from symbol names and macros

It doesn't seem to add any clarity to have a "header" suffix in controls,
struct names and flags.

Since this just makes names too long without any benefit, just drop it.

Signed-off-by: Ezequiel Garcia <ezequiel@collabora.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

media: venus: core: Parse firmware-name DT property

On production devices the firmware could be located on different
places, this path could be provided by special firmware-name DT
property.

Here we check for existence of such DT property and if it exist
take the firmware path from there. Otherwise, if the property
is missing we fallback to the predefined path from driver resource
structure.

Signed-off-by: Stanimir Varbanov <stanimir.varbanov@linaro.org>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@somainline.org>
Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

media: venus: Include io.h for memremap()

This file uses memremap() now, so we should include io.h instead of
relying on any sort of implicit include elsewhere.

Cc: Dikshita Agarwal <dikshita@codeaurora.org>
Fixes: 0ca0ca980505 ("media: venus: core: add support to dump FW region")
Signed-off-by: Stephen Boyd <swboyd@chromium.org>
Reviewed-by: Fritz Koenig <frkoenig@chromium.org>
Signed-off-by: Stanimir Varbanov <stanimir.varbanov@linaro.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

media: venus: core, venc, vdec: Fix probe dependency error

Commit aaaa93eda64b ("media] media: venus: venc: add video encoder files")
is the last in a series of three commits to add core.c vdec.c and venc.c
adding core, encoder and decoder.

The encoder and decoder check for core drvdata as set and return -EPROBE_DEFER
if it has not been set, however both the encoder and decoder rely on
core.v4l2_dev as valid.

core.v4l2_dev will not be valid until v4l2_device_register() has completed
in core.c's probe().

Normally this is never seen however, Dmitry reported the following
backtrace when compiling drivers and firmware directly into a kernel image.

[    5.259968] Hardware name: Qualcomm Technologies, Inc. Robotics RB5 (DT)
[    5.269850] sd 0:0:0:3: [sdd] Optimal transfer size 524288 bytes
[    5.275505] Workqueue: events deferred_probe_work_func
[    5.275513] pstate: 60400005 (nZCv daif +PAN -UAO -TCO BTYPE=--)
[    5.441211] usb 2-1: new SuperSpeedPlus Gen 2 USB device number 2 using xhci-hcd
[    5.442486] pc : refcount_warn_saturate+0x140/0x148
[    5.493756] hub 2-1:1.0: USB hub found
[    5.496266] lr : refcount_warn_saturate+0x140/0x148
[    5.500982] hub 2-1:1.0: 4 ports detected
[    5.503440] sp : ffff80001067b730
[    5.503442] x29: ffff80001067b730
[    5.592660] usb 1-1: new high-speed USB device number 2 using xhci-hcd
[    5.598478] x28: ffff6c6bc1c379b8
[    5.598480] x27: ffffa5c673852960 x26: ffffa5c673852000
[    5.598484] x25: ffff6c6bc1c37800 x24: 0000000000000001
[    5.810652] x23: 0000000000000000 x22: ffffa5c673bc7118
[    5.813777] hub 1-1:1.0: USB hub found
[    5.816108] x21: ffffa5c674440000 x20: 0000000000000001
[    5.820846] hub 1-1:1.0: 4 ports detected
[    5.825415] x19: ffffa5c6744f4000 x18: ffffffffffffffff
[    5.825418] x17: 0000000000000000 x16: 0000000000000000
[    5.825421] x15: 00000a4810c193ba x14: 0000000000000000
[    5.825424] x13: 00000000000002b8 x12: 000000000000f20a
[    5.825427] x11: 000000000000f20a x10: 0000000000000038
[    5.845447] usb 2-1.1: new SuperSpeed Gen 1 USB device number 3 using xhci-hcd
[    5.845904]
[    5.845905] x9 : 0000000000000000 x8 : ffff6c6d36fae780
[    5.871208] x7 : ffff6c6d36faf240 x6 : 0000000000000000
[    5.876664] x5 : 0000000000000004 x4 : 0000000000000085
[    5.882121] x3 : 0000000000000119 x2 : ffffa5c6741ef478
[    5.887578] x1 : 3acbb3926faf5f00 x0 : 0000000000000000
[    5.893036] Call trace:
[    5.895551]  refcount_warn_saturate+0x140/0x148
[    5.900202]  __video_register_device+0x64c/0xd10
[    5.904944]  venc_probe+0xc4/0x148
[    5.908444]  platform_probe+0x68/0xe0
[    5.912210]  really_probe+0x118/0x3e0
[    5.915977]  driver_probe_device+0x5c/0xc0
[    5.920187]  __device_attach_driver+0x98/0xb8
[    5.924661]  bus_for_each_drv+0x68/0xd0
[    5.928604]  __device_attach+0xec/0x148
[    5.932547]  device_initial_probe+0x14/0x20
[    5.936845]  bus_probe_device+0x9c/0xa8
[    5.940788]  device_add+0x3e8/0x7c8
[    5.944376]  of_device_add+0x4c/0x60
[    5.948056]  of_platform_device_create_pdata+0xbc/0x140
[    5.953425]  of_platform_bus_create+0x17c/0x3c0
[    5.958078]  of_platform_populate+0x80/0x110
[    5.962463]  venus_probe+0x2ec/0x4d8
[    5.966143]  platform_probe+0x68/0xe0
[    5.969907]  really_probe+0x118/0x3e0
[    5.973674]  driver_probe_device+0x5c/0xc0
[    5.977882]  __device_attach_driver+0x98/0xb8
[    5.982356]  bus_for_each_drv+0x68/0xd0
[    5.986298]  __device_attach+0xec/0x148
[    5.990242]  device_initial_probe+0x14/0x20
[    5.994539]  bus_probe_device+0x9c/0xa8
[    5.998481]  deferred_probe_work_func+0x74/0xb0
[    6.003132]  process_one_work+0x1e8/0x360
[    6.007254]  worker_thread+0x208/0x478
[    6.011106]  kthread+0x150/0x158
[    6.014431]  ret_from_fork+0x10/0x30
[    6.018111] ---[ end trace f074246b1ecdb466 ]---

This patch fixes by

- Only setting drvdata after v4l2_device_register() completes
- Moving v4l2_device_register() so that suspend/reume in core::probe()
  stays as-is
- Changes pm_ops->core_function() to take struct venus_core not struct
  device
- Minimal rework of v4l2_device_*register in probe/remove

Reported-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Signed-off-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
Signed-off-by: Stanimir Varbanov <stanimir.varbanov@linaro.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

media: venus: core: Fix some resource leaks in the error path of 'venus_probe()'

If an error occurs after a successful 'of_icc_get()' call, it must be
undone.

Use 'devm_of_icc_get()' instead of 'of_icc_get()' to avoid the leak.
Update the remove function accordingly and axe the now unneeded
'icc_put()' calls.

Fixes: 32f0a6ddc8c9 ("media: venus: Use on-chip interconnect API")
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Signed-off-by: Stanimir Varbanov <stanimir.varbanov@linaro.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

media: venus: venc: Add support for AUD NALU control

Add support for Access Unit Delimiter control into encoder.

Signed-off-by: Stanimir Varbanov <stanimir.varbanov@linaro.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

media: v4l2-ctrls: Add control for AUD generation

Add a control to enable inserting of AUD NALU into encoded
bitstream.

Reviewed-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Stanimir Varbanov <stanimir.varbanov@linaro.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

media: docs: Deprecate mfc display delay controls

Deprecate mfc private display delay and display enable controls for
new clients and use the standard controls instead.

Acked-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Stanimir Varbanov <stanimir.varbanov@linaro.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

media: s5p-mfc: Use display delay and display enable std controls

Use the standard display_delay and display_delay_enable controls,
the legacy private MFC controls are kept for backward compatibility.

Acked-by: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: Stanimir Varbanov <stanimir.varbanov@linaro.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

media: venus: vdec: Add support for display delay and delay enable controls

Add support for display delay and display delay enable std controls.
With this we implement decoder decode output order (decode vs display).
Once firmware implement few new features the controls will be used
for other use-cases.

Signed-off-by: Stanimir Varbanov <stanimir.varbanov@linaro.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

media: v4l2-ctrl: Make display delay and display enable std controls

Make display delay and display delay enable MFC controls standard v4l
controls. This will allow reuse of the controls for other decoder
drivers. Also the new proposed controls are now codec agnostic because
they could be used for any codec.

Acked-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Stanimir Varbanov <stanimir.varbanov@linaro.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

media: add a subsystem profile documentation

Document the basic policies of the media subsystem profile.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

atomisp: don't let it go past pipes array

In practice, IA_CSS_PIPE_ID_NUM should never be used when
calling atomisp_q_video_buffers_to_css(), as the driver should
discover the right pipe before calling it.

Yet, if some pipe parsing issue happens, it could end using
it.

So, add a WARN_ON() to prevent such case.

Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

media: imx: imx7_mipi_csis: Print shadow registers in mipi_csis_dump_regs()

Print the value of the ISP shadow registers in mipi_csis_dump_regs() as
this can help debugging.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Rui Miguel Silva <rmfrfs@gmail.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

media: imx: imx7_mipi_csis: Use register macros in mipi_csis_dump_regs()

Replace hardcoded register addresses in the MIPI_CSIS_DBG_CTRL()
function with macros. While at it, update the printed name of the
registers to match the datasheet, and short them by address.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Rui Miguel Silva <rmfrfs@gmail.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

media: imx: imx7_mipi_csis: Rename register macros to match datasheet

Rename several register macros to match the names from the
documentation.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Rui Miguel Silva <rmfrfs@gmail.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

media: imx: imx7_mipi_csis: Make ISP registers macros take channel ID

Replace the per-channel ISP registers macros with a single one that take
the channel as a parameter. Only channel 0 is supported for now, but
this will make support for multiple channels easier.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Rui Miguel Silva <rmfrfs@gmail.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

media: imx: imx7_mipi_csis: Define macros for DPHY_BCTRL_L fields

Define macros for the fields of the MIPI_CSIS_DPHY_BCTRL_L register,
based on the i.MX8MM datasheet. The numerical value written to the
register, taken from the i.MX7D code, is unchanged, and corresponds to a
20.0MHz Tx escape clock frequency according to the documentation of the
register from the i.MX8MM. Whether the other fields are applicable to
the i.MX7D is unknown.

While at it, rename the DPHY[BS]CTRL register names to DPHY_[BS]CTRL to
match the datasheet.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Rui Miguel Silva <rmfrfs@gmail.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

media: imx: imx7_mipi_csis: Fully initialize MIPI_CSIS_DPHYCTRL register

When setting the CSIS parameters, write the MIPI_CSIS_DPHYCTRL register
fully instead of modifying selected fields, as the register doesn't
contain any reserved fields that need to be preserved. This simplifies
initialization slightly, and ensures that the register value doesn't
depend on its previous state (before a warm reboot for instance).

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Rui Miguel Silva <rmfrfs@gmail.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

media: imx: imx7_mipi_csis: Turn register access macros into functions

Make it easier to instrument register access (for instance with
printk-based logging) by turning the macros into inline functions.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Rui Miguel Silva <rmfrfs@gmail.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

media: imx: imx7_mipi_csis: Calculate Ths_settle from source lane rate

The Ths_settle timing parameter depends solely on the lane data rate of
the source. Calculate it at runtime instead of requiring it to be
specified in the device tree.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

media: imx: imx7_mipi_csis: Move link setup check out of locked section

Checking if the link setup operation is called for the sink or source
pad doesn't require any locking. Move it out of the section protected by
the mutex.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Rui Miguel Silva <rmfrfs@gmail.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

media: imx: imx7_mipi_csis: Inline mipi_csis_set_hsync_settle()

The mipi_csis_set_hsync_settle() is small, called from a single place,
and misnamed (HS stands for high speed, not horizontal sync). Inline it
in its only caller, and refactor the HSSETTLE register field macros
while at it.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Rui Miguel Silva <rmfrfs@gmail.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

media: imx: imx7_mipi_csis: Fix UYVY8 media bus format

CSI-2 uses, as a convention, 1Xn media bus formats. Replace
MEDIA_BUS_FMT_UYVY8_2X8 with MEDIA_BUS_FMT_UYVY8_1X16, and set the width
value accordingly.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Rui Miguel Silva <rmfrfs@gmail.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

media: imx: imx7_mipi_csis: Drop 10-bit YUV support

The data type specified for 10-bit YUV is the same as 8-bit YUV. This is
wrong, and has thus clearly not been tested. Instead of fixing data type
without being able to test it, drop it. It can be added back later when
someone will have access to a 10-bit YUV source to this it.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Rui Miguel Silva <rmfrfs@gmail.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

media: imx: imx7_mipi_csis: Avoid double get of wrap clock

The wrap clock is retrieved with the other clocks using
devm_clk_bulk_get(), and retrieved independently with a specific
devm_clk_get() call. The latter isn't needed, replace it with usage of
the wrap clock from the bulk array.

As the wrap clock is mandatory, simplify its usage further by removing
conditionals.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Rui Miguel Silva <rmfrfs@gmail.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

media: imx: imx7_mipi_csis: Make source .s_power() optional

The .s_power() subdev operation is optional, don't error out when the
source doesn't implement it.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Rui Miguel Silva <rmfrfs@gmail.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

media: imx: imx7_mipi_csis: Fix input size alignment

The alignments given to the v4l_bound_align_image() are expressed in
bytes, while the function expects them to be expressed as a power of
two. Fix it.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Rui Miguel Silva <rmfrfs@gmail.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

media: imx: imx7_mipi_csis: Acquire reset control without naming it

The device has a single reset line, there's thus no need to name it
explicitly when calling devm_reset_control_get_exclusive(). Drop the
name in preparation for the removal of the reset-names property in the
DT binding.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Rui Miguel Silva <rmfrfs@gmail.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

media: imx: imx7_media-csi: Create immutable link to source device

The CSI subdev has a single source, the input video mux. There's thus a
single link between the source and the CSI, which can be made immutable
and enabled to simplify configuration.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Rui Miguel Silva <rmfrfs@gmail.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

media: v4l2-mc: Add link flags to v4l2_create_fwnode_links_to_pad()

Add a flags argument to the v4l2_create_fwnode_links_to_pad() function
to specify the link flags. This allows drivers to create immutable links
for instance.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Rui Miguel Silva <rmfrfs@gmail.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

media: imx: imx7_media-csi: Add support for additional Bayer patterns

The CSI driver only supports the BGGR Bayer patterns currently. The
hardware supports all patterns (the only pattern-dependent hardware
operation is statistics calculation, as de-bayering isn't supported),
enable them in the driver too.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Rui Miguel Silva <rmfrfs@gmail.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

media: imx: imx7-media-csi: Don't enable SOF and EOF interrupts

The SOF and EOF interrupts are not used. Don't enable them.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Rui Miguel Silva <rmfrfs@gmail.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

media: imx: imx7-media-csi: Remove double reflash of DMA controller

The DMA controller needs to be reflashed after being configured. There
is however no need to do it twice, once in imx7_csi_configure() and once
in imx7_csi_sw_reset(), called from imx7_csi_enable(). Remove the
former.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Rui Miguel Silva <rmfrfs@gmail.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

media: imx: imx7-media-csi: Don't double-enable the RxFIFO

The RxFIFO is enabled by imx7_csi_dmareq_rff_enable() in both
imx7_csi_init() and imx7_csi_enable(). Enabling it once is enough,
remove the former.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Rui Miguel Silva <rmfrfs@gmail.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

media: imx: imx7-media-csi: Don't double-enable the CSI

The CSI is enabled at the end of imx7_csi_sw_reset(), called from
imx7_csi_enable(), as well as at the end of imx7_csi_enable(). The
latter is enough, remove the former.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Rui Miguel Silva <rmfrfs@gmail.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

media: imx: imx7-media-csi: Simplify imx7_csi_rx_fifo_clear()

There's no need to read the CSICR1 register before each write in
imx7_csi_rx_fifo_clear(). Simplify the function.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Rui Miguel Silva <rmfrfs@gmail.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

media: imx: imx7-media-csi: Set RFF burst type in imx7_csi_configure()

The RFF burst type is set in imx7_csi_dmareq_rff_enable(), which doesn't
match the function name. Move it to imx7_csi_configure().

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Rui Miguel Silva <rmfrfs@gmail.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

media: imx: imx7-media-csi: Clear all configurable CSICR18 fields

When configuring the CSI in imx7_csi_configure(), the CSICR18 is set
through a read-modify-write cycle to avoid affecting fields whose usage
isn't clear. The function then sets fields depending on whether the
input is interlaced or progressive, and from the parallel input or the
CSI-2 receiver.

Those bits are only set and never cleared. For instance, when switching
from a CSI-2 source to the parallel input, the BIT_DATA_FROM_MIPI will
stay set. Fix this issue by first clearing all the fields we need to
configure.

Add BIT_CSI_HW_ENABLE to the set of fields being cleared, as the CSI
needs to start in the disabled state. This allows dropping the call to
imx7_csi_hw_disable() in imx7_csi_sw_reset().

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Rui Miguel Silva <rmfrfs@gmail.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

media: imx: imx7-media-csi: Merge all config in imx7_csi_configure()

Merge all the configuration steps (imx7_csi_buf_stride_set(),
imx7_csi_deinterlace_enable(), imx7_csi_set_imagpara() and
imx7_csi_init_default()) in the imx7_csi_configure() function. This
simplifies the configuration procedure by removing most
read-update-write cycles, and makes the code generally more readable.

imx7_csi_init_default() is kept as it is also called from
imx7_csi_deinit(). This will be addressed separately.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Rui Miguel Silva <rmfrfs@gmail.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

media: imx: imx7-media-csi: Don't set the buffer stride when disabling

There's no need to set the buffer stride to 0 when disabling the CSI.
Remove the extraneous register write.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Rui Miguel Silva <rmfrfs@gmail.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

media: imx: imx7-media-csi: Set the MIPI data type based on the bus code

The MIPI CSI-2 data type depends solely on the media bus code on the
sink pad. Deriving it from the pixel format is confusing. Simplify the
code.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Rui Miguel Silva <rmfrfs@gmail.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

media: imx: imx7-media-csi: Merge hw_reset() with init_interface()

The imx7_csi_hw_reset() and imx7_csi_init_interface() functions are
always called together. Merge them. This allows simplifying the code by
avoiding duplicated register writes.

As the imx7_csi_hw_reset() function didn't perform a hardware reset by
initialized the registers to reset defaults (in addition to resetting
the frame counter), name the resulting function imx7_csi_init_default()
as it sets default values.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Rui Miguel Silva <rmfrfs@gmail.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

media: imx: imx7-media-csi: Merge streaming_start() with csi_enable()

The imx7_csi_streaming_start() function just wraps imx7_csi_enable().
Call the latter directly.

Similarly, merge imx7_csi_streaming_stop() and imx7_csi_disable() as
they're both called from a single location only.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Rui Miguel Silva <rmfrfs@gmail.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

media: imx: imx7-media-csi: Move CSI configuration before source start

There's no reason to delay the CSI configuration and the DMA setup after
starting the source. Move it before, simplifying error handling at
stream start.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Rui Miguel Silva <rmfrfs@gmail.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

media: imx: imx7-media-csi: Split imx7_csi_dma_stop()

The imx7_csi_dma_stop() function performs two operations, it waits for
DMA to be complete, and then cleans up and frees buffers. Split the
second part out to a new imx7_csi_dma_cleanup() function to match
imx7_csi_dma_setup(), in preparation for a stream start refactoring.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Rui Miguel Silva <rmfrfs@gmail.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

media: imx: imx7-media-csi: Rename imx7_csi_dma_start() to *_setup()

The imx7_csi_dma_start() doesn't start DMA. Rename it to
imx7_csi_dma_setup() to avoid confusion.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Rui Miguel Silva <rmfrfs@gmail.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

media: imx: imx7-media-csi: Don't lock access to is_csi2

The is_csi2 field can't be accessed concurrently by
imx7_csi_pad_link_validate() and imx7_csi_configure(), as the latter is
called from imx7_csi_s_stream(), which is called after link validation.
Drop the lock.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Rui Miguel Silva <rmfrfs@gmail.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

media: imx: imx7-media-csi: Fix source type identification

The code in imx7_csi_pad_link_validate() that checks the type of the
source incorrectly handles devices that have no parallel input. In that
case, the source entity of the CSI is the CSI-2 receiver, not the video
mux, and the driver will proceed to check the type of the source of the
CSI-2 receiver.

Make the code more explicit to fix this, by handling the three cases
(parallel input only, CSI-2 receiver only, and video mux) separately.

Note that the driver will not correctly handle the case where only a
parallel input is present, and the external entity connected to the
parallel input reports a MEDIA_ENT_F_VID_IF_BRIDGE or
MEDIA_ENT_F_VID_MUX function. This was broken already, and should be
fixed separately.

Fixes: f5ffb81f5137 ("media: imx7: csi: Fix pad link validation")
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Rui Miguel Silva <rmfrfs@gmail.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

media: imx: imx7-media-csi: Validate capture format in .link_validate()

Move capture format validation from imx7_csi_configure() to
.link_validate(). This simplifies error handling at stream on time, as
imx7_csi_configure) now becomes a void function.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Rui Miguel Silva <rmfrfs@gmail.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

media: imx: imx7-media-csi: Reorganize code in sections

To prepare for a major rework of the hardware initialization, and make
the code easier to read, reorder functions to group them in sections. No
functional change is included.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Rui Miguel Silva <rmfrfs@gmail.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

media: imx: imx7-media-csi: Tidy up register fields macros

Describe multi-bit fields with parameterized macros where applicable,
and use them to replace manual shifts and hardcoded numerical values.
Add macros for the CSICR2 fields used in the driver.

While at it, align the indentation for all macros, and use lower-case
hex numbers.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Rui Miguel Silva <rmfrfs@gmail.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

media: imx: imx7-media-csi: Replace CSICR*_RESET_VAL with values

The CSICR*_RESET_VAL macros only obfuscate code. Use their value
directly, replacing the numerical value with the macros that describe
register bits.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Rui Miguel Silva <rmfrfs@gmail.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

media: imx: imx7-media-csi: Create immutable link to capture device

The i.MX7 camera pipeline is simple, with the CSI connected directly to
the capture device without any other option. There's thus no need to
allow link configurable by userspace. Make it immutable.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Rui Miguel Silva <rmfrfs@gmail.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

media: imx: imx7-media-csi: Move (de)init from link setup to .s_stream()

There's no need to initialize the CSI every time a link is enabled (and
de-initialize it when a link is disabled). Move initialization to
.s_stream() instead.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Rui Miguel Silva <rmfrfs@gmail.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

media: imx: imx7-media-csi: Remove control handler

The control handler isn't used, drop it.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Rui Miguel Silva <rmfrfs@gmail.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

media: imx: capture: Support creating immutable link to capture device

When the subdevice connected to the capture device has a single possible
sink, there's no point in making the link mutable. Support creating
immutable links.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Rui Miguel Silva <rmfrfs@gmail.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

media: imx: imx7-media-csi: Disable legacy video node API

Support for the MC-centric API has been tested on the i.MX7. Enable it
for that platform. i.MX6 should be converted next.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Rui Miguel Silva <rmfrfs@gmail.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

media: imx: capture: Expose V4L2_CAP_IO_MC for the MC-centric API

Report to userspace that the MC-centric API is MC-centric by exposing
the V4L2_CAP_IO_MC. This requires adding support for mbus code filtering
in format enumeration, as required by V4L2_CAP_IO_MC.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Rui Miguel Silva <rmfrfs@gmail.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

media: imx: capture: Decouple video node from source with MC-centric API

When operating in MC-centric mode, the behaviour of video nodes shall
not be influenced by the active configuration of the source subdev. Add
a set of ioctl handlers that implement this mode, and select them when
support for the legacy API is not requested.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Rui Miguel Silva <rmfrfs@gmail.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

media: imx: capture: Simplify __capture_legacy_try_fmt()

The __capture_legacy_try_fmt() function returns two values through
pointer arguments. One is a compose rectangle, which duplicates
informationr returned through the subdev format argument, and can thus
be removed. The other is the imx_media_pixfmt, which can be returned
by value instead.

Simplify the implementation of __capture_legacy_try_fmt() by dropping
the retcc and compose arguments, and returning the imx_media_pixfmt by
value.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Rui Miguel Silva <rmfrfs@gmail.com>
Reviewed-by: Steve Longerbeam <slongerbeam@gmail.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

media: imx: capture: Simplify capture_validate_fmt() implementation

capture_validate_fmt() delegates the media bus format to pixel format
conversion to __capture_legacy_try_fmt(). It turns out that this can be
simplified quite a lot:

- The format lookup from media bus code can be performed by the recently
  added capture_find_format() function instead of receiving the
  information from a side effect of __capture_legacy_try_fmt().

- The validation of the pixel format size isn't needed, as they
  duplicate the validation of the compose rectangle. The pixel format
  size is directly derived from the size of the incoming stream, which
  is stored in the compose rectangle. If the compose rectangle is valid,
  the pixel format size will be valid too.

By removing the validation of the pixel format size and using
capture_find_format() to lookup the format, we can stop using
__capture_legacy_try_fmt() and simplify capture_validate_fmt().

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Rui Miguel Silva <rmfrfs@gmail.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

media: imx: capture: Extract format lookup from __capture_legacy_try_fmt

Extract the format lookup code from __capture_legacy_try_fmt() to a
separate function, it will be reused when validating the video node
format at stream start time.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Rui Miguel Silva <rmfrfs@gmail.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

media: imx: capture: Return -EPIPE from __capture_legacy_try_fmt()

The correct return code to report an invalid pipeline configuration is
-EPIPE. Return it instead of -EINVAL from __capture_legacy_try_fmt()
when the capture format doesn't match the media bus format of the
connected subdev.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Rui Miguel Silva <rmfrfs@gmail.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

media: imx: capture: Pass v4l2_pix_format to __capture_legacy_try_fmt()

The __capture_legacy_try_fmt() function only needs the v4l2_pix_format
embedded in the v4l2_format argument it receives. Pass it the
v4l2_pix_format directly, allowing on caller to allocate a smaller
structure on the stack.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Rui Miguel Silva <rmfrfs@gmail.com>
Reviewed-by: Steve Longerbeam <slongerbeam@gmail.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

media: imx: capture: Remove unneeded variable in __capture_legacy_try_fmt

The __capture_legacy_try_fmt() function doesn't need two
imx_media_pixfmt pointer variables. Remove one of them.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Rui Miguel Silva <rmfrfs@gmail.com>
Reviewed-by: Steve Longerbeam <slongerbeam@gmail.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>